Piston ring



J. R- FRENCH.

PISTON RING. APPLICATION FILED MTV. 5, 1921.

1,435,228., Patented Nov. M, 1922;.

James H.5ranch i 25 It is till furthe bj t f th i n wall 10 with the base 11 to the inner edge 30 Patented Now l4, 1922. a I LddEfiZB ATENT UFHGEO JAMES R. FRENCH, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-FOURTH T JOSEPH P. GANNON, OF LOUISVILLE, KENTUCKY.

PISTON RING.

' Application filed November 5, 1921. Serial No. 513,055.

.To aZZw/wm it may concern: a ring which prevents leakage witho'ut inter- Be it known that I, JAMES R. FRENCH, a fering with the movement of the ,piston in citizen 'of the United States, residing at the cylinder, there is provided a Iiovel ring Louisville, in the county of Jefferson and consisting of a length of flexible or ductile State of Kentucky, have invented certain material 8 which is bent or extended at its 60 new and useful Improvements in Piston intermediate portion longitudinally of the Rings, of which the following is a specifilength as at 9 to provide a side Wall 10 and a cation, reference being had to the accombase 11. The side wall corresponds in panying drawings. heighth to the width of the base portion 11. 1.0 This invention relates to piston rings and The wall 10 inclines upwardly with respect 65 h f r it bj t t rovidea device of thi to the base 11, the inner face 12 of the wall character so arranged that it positively pre- 10 being beveled or canted from the junction vents leakage and at the same time does not of the wall 1O with the base 11 to the edge interfere with the movement of the piston on 13 of the wall 10, the edge 13 being adapted 15 which it is used in a cylinder. to engage the cylinder wall. In view of 79 It is another object of the invention to the inclination of the wall 10, the POI'tiOIl provide a ring of this character including of said wall below the edge 13 is slightly a strip of flexible or ductile metal which is spaced from the wall of the cylinder so 7 bent at its intermediate portion lengthwise that friction to a large extent is overcome of the .strip to produce a channeled ring, and the ring permitted to operate efiiciently. the inner face of the ring inclining out- The lower face of the base 11 is flat and wardly, said channeled ring being ur ed outadapted to engage the bottom of the groove wardly by means of an expansible ring dis- 7- upp r face 14 of the base 11 is o ed ithi th h n l, beveled or canted from the junctlon of the tion, to provide a ring of this character f f ai base. By this means, the inner which is substantially L-shaped in cross s'ecfaces 12 nd 14 of the rlng are dlsposed tion, both inne fa e of the i b in substantially in converging relation, the beveled substantially in convergent "relation, purpose of whlch W111 be herelnafter de- 30 the lower beveled face being adapted to rescribed. After the format1on of the Wall 10 ceive an expansible ring, the upper portion n ase 11 and the beveled faces 12 and 14, of said ring being adapted to extend above. the g h- 5 then formed lnto acmng. The the upper edge of the remaining wall of the n p 1 f the rmg, or one end porfirst mention d in t1on of the wall 10 and base 11, 1s beveled 35 With th d th bj t i i th toward the extrem1ty of saidend and adaptinvention consists in the improved construced recelve h Opposite end port1on 16 of tion andarrangement of parts to be hereinthe l ng h whlch 1s tapered I and part1ally after more particularly described, full reduced so as to permit a perfect un1on when claimed and illustrated in the accompanying h tapered portlon 16 1s d1sposed in en- 40 drawings, in which gagement with the end portlon 15, and at the Figure 1 is a, fragmentary sectional view Same fi -q P v the tapered p r lon of a cylinder and piston, showing the in fr nrmterfermgwlth the expanslon andrev nti n li d; 4 traction of the mug. Figure 2 is a perspective view of the main 0011118531011 )Vlth t g her 18 pro- 45 rim f the d i vided an expanslble ring 17, sald ring be ng F igure 3 is a sectional view of the engaged substantially rectangular 1n cross section d f th i i d with the exception that its longitudinal Figure 4 is an enlarged sectional view of edges are rounded, the wldth of the ring 8 the mainand ex 'ansible rings. corresponding to the helght of the wall 10,

50 Referring to t e drawings,'5 designates a while the thickness of the rim is only half cylinder of conventional form in which a, the width of the base 11. T e ring 17 1s piston 6 ismounted, the piston having the sprung upwardly so that, when contracted usual ring groove 7. t will serve to urge the mug 8 outwardly,

In order to roperly position a ring withit bein of course obvious that the ring 17 56 in the groove i and at the same time supply is of t e separable type. The ring 17 is 10 adapted .tobe disposed within channel of the wall 10 and the ring 17 so that anyner face of'the wall 10 and directed downformed by the wall 10 and base 11 of the ring. 8, one of the rounded edges of the ring 17 being engaged with the beveled face 14 of the base 11 7 An important feature of this device is that the beveled face 14 of the base 11 substantially serves as a wedge, and as the rin 17 is disposed upon said face 14, contact 0 the upper edge of the ring with the upper wall of the groove 7, together with the expansible force of the ring 17 will cause the ring 8 to be moved upwardly by the riding of the 7 ner face. of the wall 10. In this way an oil pocket is formed through the cooperation oil or matter removed from the c linder by the edge 13 of the wall 10 will be directed into the pocket between the ring 17 and inwardly by the beveled face 12 of the wall 10. Furthermore, as the expansible ring is disposed upon the beveled face 14, it prevents the edge 13 of the ring 8 from coming in contact with the edge of the upper "wall of the groove 7 'so that danger of said edge obstructing the passage of the oil intothe oil pocket is prevented. At the same time, the edge 13 does not interfere with the expansion of the ring.

From the foregoing it will be readily seen that this invention provides a novel form of piston ring which positively prevents leakage, and wherein the expansible means for the main ring is not resisted in its expansion, but assisted through the reduction of friction and the direction of the expansible force to the proper portion of the main ring. All of these features are possessed bya ring arrangement which is simple in construction and which does not require a special make of piston' or groove for 1ts use.

What is claimed is 1. A; piston ring of the character described comprising a ring including a side and a base portion, said side portion tapering upwardly and extending outwardly with respect to the base portion, said base portion having its upper surfacebeveled outwardly with respect to said side portion, and an ex.- pansible ring normally disposed centrally of the beveled base portion in spaced relation to the junction of the side portion with the base portion, said side wall being urged outwardly into engagement with a cylinder upon expansion of the ring on said beveled base portion. i

2 A piston ring of the character described comprising a ring including a side and a base portion, the inner faces of the side and base portions being. canted outwardly from the junction of said side and base portions to the edges thereof, an expansible ring, said ring being substantially rectangular in cross section and having its longitudinal edges rounded, one of said edges bein adapted to engage the inclined or canted ace of the base portion, whereby expansion of the expansible ring will cause 'a radial thrust upon the base portion and through the medium of the beveled face of the base portion to urge the first mentioned ring outwardly.

j 3. A piston ring of the character described comprising a ring including a side and a base portion, the'inner faces of the side and base portions being canted outwardly from the junction of said side and base portions tothe edges thereof, an expansible ring, said ring being substantially rectangular in cross section and having its longitudinal edges rounded, one of said edges bein adapted to engage the inclined or canted Face of the base portion, whereby expansion of the expansible ring will cause a radial thrust upon the base portion and through the medium of the beveled face of the base portion to urge the first mentioned ring outwardly, said expansible ring being disposed in spaced relation to the canted face of the side portion of the first mentioned ring and cooperating with said side portion to form a pocket for the reception of foreign matter.

In testimony whereof I hereunto afiix my signature 1 JAMES R. FRENCH. 

